D maybe this can help you for it
You should look at web sources that have recently been updated because a lot of times new information is present that could change the original point/evidence. This could discredit the source. You also should do this because the newer the information, the more credible it is in the time (older information could easily be outdated).
Answer:
me I can be yours.........
The effect of natural voice is that it changes the pitch of the voice.
